Biology determines handedness in chimps, study finds

What makes a chimpanzee left-handed–nature or environmental influences? Mostly nature, according to a recent study of chimp mothers and infants. That result refutes past animal research, which suggested that behavioral reinforcement and other external factors largely determine animals’ hand–or paw–preferences. In contrast, this study from Emory University’s Yerkes Regional Primate Research Center found that a […]

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